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Elgin, MN (KROC-AM News) - The National Transportation Safety Board has determined the recent crash of a crop-dusting helicopter occurred when the aircraft's rotors came into contact with some power lines.

The helicopter exploded when it crashed into a farm field near Elgin on the afternoon of July 19th. The pilot, 40-year-old Corey Adcock of Texas, was killed in the accident.

The NTSB’s preliminary report says a witness saw the helicopter make two passes over a set of power lines while spraying a field before attempting to fly under the power lines on the third pass. The witness says he had just entered a large pole barn when he “heard a loud boom, and the pole barn shook.” He then saw smoke rising from the crash site and found the helicopter engulfed in flames.

NTSB photo
NTSB photo
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The NTSB says the wreckage at the site and damage to the power lines suggests a rotor struck and frayed one of the power lines and severed another. Investigators determined there was less than 20-feet between the top of the corn in the field and the height of the severed power line.

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The preliminary report, which is subject to change before the NTSB issues the final report on the crash, did not find any evidence of a mechanical malfunction of the aircraft or its engine.

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